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Select rows of a matrix that meet a condition
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edited Mar 22 '11 at 13:09
answered Mar 22 '11 at 13:04
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How can I use 'Not Like' operator in MongoDB
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edited Jul 30 at 5:24
whoami
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answe...
Why is using the rails default_scope often recommend against?
... when wanting to show unpublished (private) posts. So far so good.
2.1.1 :001 > Post.all
Post Load (0.2ms) SELECT "posts".* FROM "posts" WHERE "posts"."published" = 't'
Well this is pretty much what we expect. Now lets try:
2.1.1 :004 > Post.new
=> #<Post id: nil, title: nil, p...
Selecting multiple columns in a pandas dataframe
...s of the first two columns) then you can do this instead:
df1 = df.iloc[:, 0:2] # Remember that Python does not slice inclusive of the ending index.
Additionally, you should familiarize yourself with the idea of a view into a Pandas object vs. a copy of that object. The first of the above methods w...
count members with jsonpath?
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code4kix
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answered Dec 10 '13 at 15:52
lopisanlopisan
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How to index into a dictionary?
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Dictionaries are unordered in Python versions up to and including Python 3.6. If you do not car...
OrderBy descending in Lambda expression?
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edited Jul 19 '11 at 19:01
answered Oct 28 '09 at 6:34
Jo...
MySQL - length() vs char_length()
...> 3, 1
As you can see the Euro sign occupies 3 bytes (it's encoded as 0xE282AC in UTF-8) even though it's only one character.
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Should have subtitle controller already set Mediaplayer error Android
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edited Jan 21 '15 at 20:16
answered Nov 22 '13 at 16:28
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How do I compare two strings in Perl?
...ment is stringwise not equal to the right argument.
Binary cmp returns -1, 0, or 1 depending on whether the left argument is stringwise less than, equal to, or greater than the right argument.
Binary ~~ does a smartmatch between its arguments. ...
lt, le, ge, gt and cmp use the collation (sort) orde...